Safety guard



F. S. BENEDICT.

SAFETY GUARD.

APPLICATION HLED MAR. 1, 1922.

agma, Patented 00. 17,1922,

2 SHEETSSHEET I.

W s/Q m8 @7 2 ffi Mary HS BENEDICT.

SAFETY GUARD.

APPLICATION FILED MAR. I. 1922.

sgmao mum 001117 11922.

2 SHEETS-SHEET 2- Patented @et. 1?, I922.

T%WTED STATES PATENT SAFETY GUARD.

Application filed March 7, 1922.

To all whom it may concern:

Be it known that I, FREDERICK S. BENE- DIo'r, a citizen of the UnitedStates, residing at Granston, in the county of Providence and State ofRhode Island, have invented certain new and useful Improvements inSafety Guards, of which the following is a specification.

My invention relates to safety guards for pulleys and. belts.

The essential objects of my invention are to conform to the compulsoryrequirements of liability insurance company standards including theavoidance of an opening greater than one-half an inch within four inchesof the part guarded; to provide a single structure adapted for use uponpulleys of varying sizes and in different or changed locations and uponvarious machines, and upon belts disposed vertically, or inclined to theright or left, or converging or diverging; to enable standardization ofparts, minimize expense of construction, and facilitate application tothe parts to be protected.

To the above ends essentially my invention consists in such parts and insuch combinations of parts as fall within the scope of the appendedclaims.

In the accompanying drawings which form a part of this specification,

Figure 1 is a perspective view of a guard embodying my invention,

Figure 2, a vertical central section of the same showing in sideelevation a pulley and a belt enclosed thereby,

Figure 3, a rear elevation of the same,

Figure 4, a section of the guard on line 4-4 of Figure 2, and

Figure 5, a partial section, corresponding with that of Figure 2, ofanother position of a belt enclosing member.

Like reference characters indicate like parts throughout the views.

In its preferred form of embodiment my device comprises a drum 7 andtangentially disposed sectional tubes or wings 8 pivotally attachedthereto. The drum serves as a housing for a pulley 9 mounted on a shaft10, and the tubes constitute closures'for a belt 11 engaging the pulley.In detailthe drum comprises front and rear head end plates13 providedwith central openings 14 and spaced peripheral lugs 16 provided withperforations 17 to receive bolts on tie rods 18, each having a squaredhead 19 and a thread 20 engaged by a nut 21. The side 22 Serial No.541,765.

of the drum, which is cylindrical in shape, may be engaged with theheads in any desired'manner. In this instance it comprises two spacedsections consisting of a semicircular bottom section 23, and an arcuatetop section 24 spaced at both ends from the first section formingresultant lateral openings 25. Peripheral lugs 27 on opposite ends ofthese sections register with the lugs 16 and have perforations 26through which pass the rods 18. By the described means the parts of thedrum are readily assembled and disassembled. One or both of the endplates 13 may have a radial opening 29 to receive a removable fillingstrip 30 fastened in this case by transversely disposed spaced metalplates 32 fast to the strip and project ing laterally therefrom, andprovided in their extended portions with slots 34 adapted to looselyreceive pins 35 in the end plate. The opening 29 which extends from theperiphery of the end plate to the opening- 14 admits passage of a shaft10 to the latter, after which the opening 29is closed by the fillerstrip.

Loose upon diametrically opposite rods 18, disposed in the samehorizontal plane adjacent the lower ends of the openings 25 arehingesleeves 37 upon depending hinge straps 38 fast to the members 8 by pins39 or otherwise. The described parts constitute hinge members for thebelt housing members or arms 8. As illustrated the latter include lowerand upper tubular sections 41 and 42 of oblong rectangular crosssection, the latter telescoping in the former. Each section 41 comprisesan outer wall 44 to which the hinge is attached, an inner wall 45, andfront and rear walls 46 and 47. The rear wall 47 has a centrallongitudinal slot 48 extending throughout its length to permit theadmission of a belt 11. The lower portion of each wall 45 is cut away toform an opening 50. In this instance the four corners of sections 41 arereinforced by angle irons 51.

The sections 42 are a sliding fit in the sections 41 and are verticallyadjustable by any convenient means. In this instance the ad justingmeans consists of a removable plug 53 insertable in a perforation 54 ina wall of the section 41, and in one of a vertical series ofperforations55 registering with the first perforation. The rear walls 58 of thesection 41 are provided with central longitudinal slots 59 extendingthroughout their lengths and registering with the slots 48 for admissionof a belt 11. The corners of sections' 4-2 are reinforced by angle irons60. The vertical adjustability of the sections are useful in fulfillinginsurance requirements of sheathing the belts any given height above thefloor.

Slidably mounted upon the inner faces of the inner walls 45, and closingthe upper portions of the openings 50 are slides or plates 62terminating in hinge sleeves 63 engaging pintles 64 embraced by hingesleeves 66 on arcuate slides or plates 67 slid-v ably engaging the innerface of the drum section 24, and closing the upper portions of theopenings 25. The slides 62 are pressed into contact with the walls 4-5by resilient guiding fingers 69 overlapping the slide and fast at theirupper ends by rivets 70 to the walls. Spaced plates 71 are fastened byrivets 72 in their central portions to the section 24: and their endportions constitute resilient guide fingers 74: which overlap theadjacent inner end portions of the P at s The lower portions of thesections 41 pass through the openings 25 and into the drum, the walls44c only being tangential thereto. The lower portions of the walls 46and 47, by virtue of the openings 50, straddle the pulley 9. and slidefreely in contact with or adjacent the inner faces of the drum ends.Hence nothing impedes an inwardly inclined position of the sectionalarms 8 such as shown in broken lines in Figure 5'.

It will be observed that changing the inclination of one or both thesectional arms 8 inwardly or outwardly leaves no resultant openings ineither the cut away portions of the drum or of the sections 41, becauseof the slidable character of the pivoted plates 62 and 67.

If desired auxiliary means may be cmployed to assist to maintain thearms 8 in fixed relation tov each other after being applied to themachine. One such means consists, as shown in Figure 1, of a flat rod orlatch 76 pivoted at one end to a pin 77 on one section iland providednear its other end, with a series of lateral cavities 7 8 in its loweredge in one of which registers a pin 80 fast in the other section 41.

I claim 1. In a machine safety guard, a drum provided with peripheralopenings, tubular arms pivotally supported on the drum adjacent the,openings, and plates slidably mountedon the drum across the openings,carried by the arms.

2 In a machine safety guard, a drum provided with peripheral openings,tubular arms pivotally supported on opposite sides.

' of the drum and provided with lateral openings; adjacent. the drum,plates, slidably mounted, on the drum across'the peripheral the lateralopenings pivotally attached to end plates, peripheral projections on the1 ,aeaoes openings, and plates slidably mounted on the arms across thelateral openings pivotally connected with the first mentioned plates.

3, In a machine safety guard, a drum provided with peripheral openings,tubular arms pivotally supported 011 the drum adjacent the openings,guides fast to the drum, slidable plates engaging the guides carried bythe arms and movable across the openings.

4. In a machine safety guard, a drum provided with peripheral openings,tubular arms pivotally supported on opposite sides of the drum providedwith lateral openings adjacent the drum, guides fast to the drum,slidable plates engaging the guides movable across the peripheralopenings, guides fast to the arms, and slidable plates" engaging thelast mentioned guides movable across the first mentioned plates.

5. In a machine safety guard, a drum comprising a body, endplates'engageable with the body, peripheralprojections on the body, andbolts connecting the body and end plates through the projections,tubular arms, andhinge members carried by the arms engaging the bolts onopposite sides of the drum. f l r 6. Ina machine safety guard,'a body"comprising a semi-circular bottom section and an arcuate top sectionspaced from each other to constitute openings, end plates, a boltconnecting the top section with the end plates, bolts connecting thebottom section with the end plates, and tubular arms pivotally mountedon the last mentioned bolts movable into and out of the openings- 7. Ina'machin'e safety guard, a drum provided with a radial opening, tubulararms carried by the drum, and a guard strip detachably mounted in thearm acrosstheopening.

8. In a machine safety guard, a drum provided with a radial opening, atubular arms carried by the drum, pins in the drum beside the opening, aguard strip in the opening, and cross pieces on the strip provided withcavities adapted to receive the pins.

9. Ina machine safety guard, a drum, tubular arms pivotally supported onopposite sides of the drum, a latch pivotally mounted on. one arm andprovided with a 1 longitudinal series ofcavities, and a pro j ection onthe other arm adapted to register in one of the cavities. v

10. In a machine safety guard, a drum, tubular sections pivotallysupported. on opposite sides of the drum provided with iongitudinalSlOtS,faI1d tubular sections telescoping n the first sectionsandfprovi'ded with, longitudinal slots registering with the,

slots in the first sections.

11. In a machine safety guard, a drum, tubular sections pivotallymounted on the drum provided With longitudinal slots, tubular sectionsslidably mounted in the first 5 sections provided with longitudinalslots registering With the first slots, one of said sections beingprovided With a longitudinal series of cavities, and a, projection inthe other of said sections adapted to register in said cavities.

In testimony whereof I have afiixed my signature.

FREDERICK S. BENEDICT.

